Tailstock for multiple-spindle lathes



Sept. 16', 1924. v z. l.. Ln'vlNAs TAILSTOCK FOR MULTIPLE SPINDLE LTHES Filed' nee.V 17. 1921 v A a a.. i

arl w Patented Sept. l5, 1924i,

restez f ZENONAS L. LITVINS, OF CHCAGO, ILLINOlS.

Application filed December To all rw/wm t may concern Be it known that l, ZnNoNAs L. Li'rvrNAs, a citizen of Lithuania, residing at Chicago, county oi Cook and State ot' illinois, have invented certain new and usetul improvements in Tailstoclr for li/Iultiple-Spindle Lathes. ot which the following is a specifica tion.

rThis invention relates to an iniproven'ient in multiple spindle lathes, and is directed particularly to means for securingl the tail stock spindles in adjusted positions "for holding the centers.

The invention is illustrated in the accoinpanying drawings, in which:

Fig. 1 is a vieiv in broken elevation showing a portion ot a multiple spindle lathe with the in'iprovement applied thereto.

Fig. 2 is a vertical section through the tail stock.

Fig. B is a section on line 3 3 ot 2,

the locking means being shown in elevation.

ln the drawings, the tail stock 1is mounted upon the bed in the usual manner, and provision is made for supporting a plurality ot work pieces, as 2 and 3, thereby.

The centers l and 5 have the usual pointed ends 6 to cooperate with the :vork pieces, these centers beingl mounted in tail stock spindles 7 and 8, having channels D to slidably receive pins 10 adapted to engage the centers at one end and provided at the opposite end with enlargements 11, to be engaged by rods 12 threaded in the spindles.

The rods are provided with collars 13 to prevent endivise movementin one direction and extended through the tail stock and provided on their free ends with hand Wheels 14C 'tor convenient rotation of the rods. Obviously, by proper manipulation ot the rods, the centers may be accurately positioned to support the ivorl; pieces.

The locking device 'for holding the spindles comprises bolts 15, slidably mounted in a channel 16 extending vertically ot the tail stock and opening into the spindle receiving bores. This channel is interrupted at its mid-length by a transverse channel 17, which opens through one side Wall of the tail stock. In the channel 17 an adjusting member' is arranged in the form of a conical element 18, in 'which is threaded a rod 19 which extends through the side Wall of the tail stock and is provided with an adjusting lWheel 20. The reduced terminal of the conical element 18 has a collar 21 slidably titting the channel 17 andk between this collar and a closing piece 22 for the end ot' the channel is arranged a coil spring 23 serving to assist in feeding the conical element in one direction.

The ends of the bolts 15 bear against the spindles 7 and 8 respectively, and it is obvious that by vadjusting the conical element 18 in one direction, these bolts Will be caused to trictionally engage and lock the spindles, 'the opposite movement of the conical element freeing the rictional lock.A

lslhat I claim as new and desire to secure by Letters Patent of the United States is 1. 'In a multiple spindle lathe, a tail stock having spindles, centers carried thereby for engaging the Work, threaded bolts for adjusting said centers, hand Wheels for operating the bolts, latches for engaging the spindles, a cone :tor operating the latches to lock the spindles, and means for operating the cone.

2. In a multiple spindle lathe, a tail stock, a plurality of spindles mounted therein, centers carried by said spindles to engage the Work, means for operating the spindles to adjust said centers toward the Work, and means for simultaneously locking said spindles in adjusted positions. In a multiple lathe, a tail stock, a plurality of spindles operative therein, centers carried by the spindles for engaging the work, means for adjusting the spindleswlongitudinally of the tail stock, latches operative transversely" ot the tail stock and adaptv ed to frictionally engage the respective spindles, ay cone arranged transversely of the latches* and between thel adjacent ends oil the same, andr` means for operating the cone transversely'of the latches to cause said latches toy frictionally engage'and secure the spindlesfin fixed relation to the tail stock. o n

In testimony Whereoic I have atlixed mv signature,- .v Y ZENONAS L.. LTVINA S. 

